linux判断文件是否存在

if test -e /path/to/file; then
    echo "File exists."
else
    echo "File does not exist."
fi

if [ -e /path/to/file ]; then
    echo "File exists."
else
    echo "File does not exist."
fi

if ls /path/to/file &> /dev/null; then
    echo "File exists."
else
    echo "File does not exist."
fi

if stat /path/to/file &> /dev/null; then
    echo "File exists."
else
    echo "File does not exist."
fi

sudo chmod 755 /path/to/file

if [ -L /path/to/symlink ] && [ -e /path/to/symlink ]; then
    echo "Symbolic link is valid and points to an existing file."
else
    echo "Symbolic link is broken or points to a non-existing file."
fi